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Cell theory, or cell doctrine, is based on several basic principles. Choose the description that best addresses these principles:

A. All living organisms are composed of one or more cells.
B. The cell is the basic unit of structure and organization in organisms.
C. Cells arise from pre-existing cells.
D. All of the above.


Sagot :

Final answer:

Cell theory in biology states that cells are the fundamental unit of living organisms, with all cells arising from preexisting cells.


Explanation:

Cell theory is a fundamental concept in biology that states cells are the basic unit of living things and can have an independent existence. The theory also indicates that all living organisms are made up of at least one cell, and living cells always come from other living cells. This theory was developed over time through the work of multiple scientists such as Schleiden, Schwann, and Virchow.


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